How about pushing the 30 degree shoulder to 35 degrees andI didn't change the shoulder because I didn't want to increase capacity.
giving yourself a bit longer neck ?? Call it the 7 PRC-AW !!
How about pushing the 30 degree shoulder to 35 degrees andI didn't change the shoulder because I didn't want to increase capacity.
I’ve been shooting the 7 Saum (hunting rifles) for years, the attractive thing about the 7 PRC would be a slight reduction in capacity. I think the Saum is around 73 grains H2O and the H2O is around 68 grains for the PRC. Similar velocities. The Saum is such an efficient case. I guess the accuracy of the PRC must be there and it must be easy to tune. If nothing else it sounds like a good excuse to build a rifle.The 7-6.5 prc is about 3 years old. It will take over in f open imo. The 6bra dates back to the 80s. It just had to break a bunch of records to become popular. You almost need a new parent case to have a new wildcat.
That cartridge has a rim like the 225 winchester is why I asked. What is the parent case?Nope. Its a 6.5 BR Lapua case and it is a wildcat.
Parent is the 7.62x53r and there is a very detailed website about its development I made a few years ago here. https://65brlapua.wordpress.comThat cartridge has a rim like the 225 winchester is why I asked. What is the parent case?
Sounds like an interesting project.Parent is the 7.62x53r and there is a very detailed website about its development I made a few years ago here. https://65brlapua.wordpress.com
I must confess though I have neglected it mainly because business is so crazy I did not have any more time to mess with it. Now that the economy is dead and business slows I might get a chance to work on it again.
Thus far as i know, the radiused shoulder has not proven better, or worse than a standard cartridge.I am very satisfied with the 6BRAI (6BRA) with its 40 degree shoulder. But, I have wondered what 6BR with a radius shoulder like a Weatherby would shoot like? Anyone want to try it? I know Weatherbys are not known for great accuracy because of their excessive freebore and barrels are not match quality. Some did well at 1000 yards years ago with a match grade barrels chambered in 300 Weatherby. If you think about it, the ports in a race engine do not have sharp edges. They have the smoothest radius edges for smooth, even, air/exhaust flow to create the most HP. I wonder if the physics in that thought translates into rifle cartridges?
This was also my understanding when I was considering a radiuses shoulder.Thus far as i know, the radiused shoulder has not proven better, or worse than a standard cartridge.
Grimstod-This was also my understanding when I was considering a radiuses shoulder.
Grimstod -A shorter 284win cases did interest me at one time. What steered me away from it was two things. One I did not like the primer pocket life of the 284. Minaly a problem because it is a rebated rim. Second was that no one was getting great accuracy out of it. I attribute that to donuts forming in the neck as the shortened body is just a lot of work to rework and you have to get your neck turning just right.
Its still an interesting one though. I think most cartridges are to long and put you into donut zone. Ah yes the dreaded donut. Don't salivate any of you coppers on here. It is not the same thing.
Grimstod -A shorter 284win cases did interest me at one time. What steered me away from it was two things. One I did not like the primer pocket life of the 284. Minaly a problem because it is a rebated rim. Second was that no one was getting great accuracy out of it. I attribute that to donuts forming in the neck as the shortened body is just a lot of work to rework and you have to get your neck turning just right.
Its still an interesting one though. I think most cartridges are to long and put you into donut zone. Ah yes the dreaded donut. Don't salivate any of you coppers on here. It is not the same thing.
I made a wildcat from 284 win also I called it a 6mmALS ( 6mm-284 short ) started as a .224 but barrel life was to short and ended up as a 6mm ,that I did shoot in a 600 yd matchs and got 3 shots around a inch but could never keep the other 2 in the group . But I was using a 24 power scope a 36 or 46 power would have been better . The 2 middle cases are mine I made my own form and reloading dies . Was a fun project .Confirmed and addicted with the wild catting hobby, and I take
what I make to match's. The 284 Winchester case has been my
primary case to work with. A short version I call the 284-ELF was
put away due to component sourcing, of which the BR2 primers
were needed for this past match season in another cat I've been
competing with. One match left this year and the ELF will be back
on the bench.
Its a good looking design and seams balance. This is one of the reasons I was nearly persuaded to go this route but did not in the end just because I worried to much about thick spots in the brass.All -
Howdy !
Here's a pic of the somewhat crudely formed 6mm wildcat, which was formed on a fore-shortened .284Win case.
The " semi-hemi " shoulder was a byproduct of the final case forming step I used, which was to for the rounded shoulder in a press; using a engine compression adapter I bought @ an auto parts store.
It's not a double radius shoulder.
With regards.
357Mag
Inside neck reaming has always interested me but I did not understand it relation to outside neck turning. I know it can get rid of donuts but would that only be the case if you are not using a neck expanding ball?Grimstod -
Howdy !
If one needs to do a large enough " shoulder shove " downward on the case for the wildcat, then heck...
all of the neck' wall is thickened.
There's a pic below, showing the amount of shoulder shove I put on the 7 X 64 case, when forming my
" DEEP 6 " wildcat.
Using just one case forming die in-conjunction w/ an inside neck ream and outside neck turn; I could form
.224" cal, 6mm, .25" cal' and 6.5mm " wildcat " cases off the same " parent " brass.
For the .224" cal and 6mm iterrations, a chamber can be cut using an exisiting reamer. For the .224" cal variant, a .22-6mm Remington ( .224 TTH ) would be run-in "short "; for a nominal .466" base diam.
For the " DEEP 6 " wildcat I shoot presently, a 6mm Remington reamer was run-in short, to get the .466" base diam that allowed use of 7 X 64 as the parent case.
With regards,
357Mag
Grimstod-Inside neck reaming has always interested me but I did not understand it relation to outside neck turning. I know it can get rid of donuts but would that only be the case if you are not using a neck expanding ball?
I actually went down this road once. But have switched back to FL sizing. It just give better results. I thank that is because it arrests the changes and resets the conditions of the cartridge case.n example of where when one would probably need to do an inside neck ream on the wildcat cases
Expander balls:
I myself haven't used an " expander ball " ( such as is found in a FL size die ) for decades, as part of the od my cartridge reloading regimine. I likewise haven't had to FL size for decades..... only shoulder bump and
neck size my brass.